1.Considering the law of conservation of mass, explain how rusted iron can weight more than iron.
2.Classify Bromine, Carbon and Sulphur into gas, liquids or solid at room temperature.
2007-03-19 15:21:37 · 3 個解答 · 發問者 ? 7 in 科學 ➔ 化學
1. Iron react with oxygen to form rust. The mass of iron plus mass of oxygen equal the mass of rust so formed.
2. Bromine -- liquid
Carbon and Sulphur -- solid
2007-03-19 15:31:50 · answer #1 · answered by ? 7 · 0⤊ 0⤋
the earlier answer is better
2007-03-24 04:12:51 · answer #2 · answered by ? 7 · 0⤊ 0⤋
The equation of rusting:
4Fe+3O2+2nH2o---->2Fe2O3.nH2o
Iron reacts with oxygen and water to form crystal which is heavier.
rusted iron can weigh more than iron.
2
Bromine is gas
Carbon is solid
Sulphur is solid
2007-03-20 19:03:34 補充：
bromine is liquid, not gas
2007-03-19 15:30:52 · answer #3 · answered by Joe 2 · 0⤊ 0⤋